Abstract: The present disclosure provides a chassis configured for use an energy storage system. The chassis comprises a housing configured to support a plurality of battery cells, a first sidewall pad and a top wall pad configured to cushion the plurality of battery cells when supported within the housing, a compression wedge configured to fit between the plurality of battery cells and a second sidewall of the chassis to apply a compressive load on the plurality of battery cells, and a retention bracket configured to connect to a first sidewall of the chassis and the second sidewall to maintain the plurality of battery cells against a rear wall of the chassis.

Abstract: A battery system comprising an enclosure having a first end, a second end and a housing extending between the first end and the second end to define a space within the enclosure. At least one opening defined by the first end of the enclosure such that the at least one opening accommodates a plurality of removable power modules. A plurality of input/output connectors are positioned on the enclosure to couple DC and AC power to and from the enclosure. A circuit board is positioned in the enclosure to distribute the AC and DC power between the plurality of input/output connectors and the removeable power modules. Each removeable power module is a standalone power module that forms an AC and/or DC power source separate from the enclosure or, alternatively, when coupled to the enclosure, forms a multiple power module battery system.